Pneumatic renovator.



PATENTED JULY sro, 1907.

F. T. SNYDER. PNEUMATIG RENOVATOR.

APPLICATION FILED DEO.11, 1905.

PATENT oEEIoE.

FRANK T. SNYDER, OF ST. LOUIS, MISSOURI.

PNEUMATIG RENovAToR.

Specication of Letters Patent.

Patented July 30, 1907.

Application tiled December 11,1905. Serial No. 291,272.

To all 'whom 'it may concern:

Be it known that I, FRANK T. SNYDEE, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain newand useful Improvemeins in PneumaticL ltenovators, of which the following is a full, clear, and exact description', reference being had to the accompanying drawings, forming a part hereof. l

My invention has relation to improvements in pneumatic carpet renovators; and consists in the novel construction and arrangement of parts more fully set forth in the specification and pointed out in the claims.

In the drawings, Figure l is a side elevation of my invention; Fig. 2 is a top plan thereof; Fig. 3 is ahorizoutal section on line 3-3 of Fig. 4; Fig. 4 is a vertical sectionl on the broken line 4-4 of Fig. 3; Fig. 5 is a vertical transverse section on the line 5 5 of Fig. 3; Fig. 6 is a vertical transverse section on line 6-6 of Fig. 4; Fig. 7 is a bottom plan view with part of the blast nozzle broken away; and Fig. 8 isa face elevation of the broad side of the blast nozzle.

The present invention relates to pneumatic carpet renovators in which compressed air by direct impact against the article to be cleaned is availed of for purposes of removing the dirt in conjunction with a current induced through the pores of the article by means ol an ejector discharging air under pressure into an exhaust pipe communicating with a chamber which leads directly to the surface of the article. The present device in the majority of cases can, however, renovate a carpet without bringing the impact current into requisition, the induced current being suflicient to accomplish` the work.

The object of the invention is to construct a renovator which shall be simple, effective, one possessing a maximum efficiency, one containing a minimum number of parts readily assembled or taken apart, one in which the element of leakage is practically eliminated, and one possessing furtherand other advantages better apparent from a detailed description of the invention which is as follows:

Referring to the drawings, 1 represents a casing having an interior chamber 2 open at the bottom forsubstantially the full length of the casing, the said bottom being adapted to rest upon the carpet C to be renovated. i Formed with the top of the casting of which the casing l is composed is a rearwardly extending centrally disposed hollow boss 3 which receives the lower end of an exhaust pipe 4 the upper end of said exhaust having attached thereto a hose 5 which leads to any suitable dust receptacle (not shown). Tapping the casing on each side of the boss 3, are pipes 6, 6 respectively branching from a common coupling 7 which serves as a handle' and to which the compressedair supply hose 8 is attached. The upper end of the pipe 6 is provided with'avalvc 9 to cut off the compressed air when the pipe is not called into requisition. The pipe 6 corrununicates with a horizontally disposed channel 10 formed iu the casing l, Ithe opposite end of the channel connnunicatiug'with an annular chamber l1 formed in the casing beyond the basal wall 12 of the boss 3, and around the peripheral walls of a hollow cylindrical exhaust or induction nozzle 13 inserted into the casing l through the iront said nozzle being supported by said front wall and the wall 12 as best shown in Fig. 6. The nozzle 13 terminates in a conical perforated tip 13', the opposite end of the nozzle heilig closed by a plug 14 (Fig. 3). The annular chamber 1l communicates with the interior of the exhaust nozzle through the peripheral openings 14. y

The pipe 6/ communicates with a horizontally dis-l posed channel 15 whose inner end in turn communicates with a hollow socket 16 through the peripheral wall thereof, said socket forming the lower extension of a bolt 17 which is received by and inserted into an being inserted into position through the open mouth of the chamber 2 when the parts are assembled as presently to appear. The free end of the socket'terminates'in an enlarged portion 16/ forming an annular shoulder with the part 16 between which shoulder and the bottom of the chamber is inserted a packing ring 18, a similar ring 18 being passed over the screwthreaded portion otthe bolt under the nut 19 by which the parts are eventually clamped together. (Fig. 5).

Adapted to be inserted into the chamber 2 through the open mouth thereof is the blast nozzle which in the present instance is made of two sections or halves 20, 20 chambered or hollowed out longitudinally, such longitudinal chamber 21 opening at the bottom through a slit 22....formed between the sections, and communicating with the passage or Achannel 15 at the top by means of a passage 21 and a screw-threaded nipple 23 which is coupled to the interiorly screwthreaded end of the socket 16. The ends of the blastnozzle sections terminate in lugs 24, and after the nozzle is inserted into the chamber 2, the lugs rest on ledges 25 formed in the end walls of the casing, said ledges limiting the distance to which the blast nozzle shall'enter the casing, so that the bottom of the nozzle shall always be disposed in substantially the same plane as the edgesof the mouth of the chamber 2 (Figs. 5, 6). To prevent any leakage of air from between the sections of the blast nozzle, l form in cach section suitably disposed grooves 26 which when the sections are assembled form cylindrical tubes or passages for the reception and inclosure of cylindrical l sections of rubber packing 27 .y The sections are connected by screws 28 passed through openings 29 disposed adjacent to the grooves.

.In assembling the parts, the blast-nozzle sections wall thereof,

opening formed in the top wall of the casing, the bolt v ing screwed to the socket 16 of the bolt 17, after which the parts are inserted into the casing l through the mouth of the chamber 2 thereof, thebolt 17 projecting above the. casing. The nut 19 is subsequently passed over the bolt and screwed forcibly against the casing, this action tending to draw the nozzle 20 iirnily againstlthev ledges 25 against which the limiting lugs 24 rest. The operation of the device Ais as follows: Let us assume that the valve 9 is turned to its closed position. Compressed air from any available pump or compressor is forced into the pipe Gthrough the hose 8, the current entering the passage 10 whence it enters the annular space 11 around the exhaust nozzle 13. The current thence passes into the nozzle-13 escaping therefrom in a line jet through the tip 13 into the exhaust pipe 4. This jet induces an upward current in the chamber 2 around the blast-nozzle 20, the resulting suction drawingthe dirt and dust out of the carpet and delivering the same into the pipe 4 whence the dust-laden air escapes through the hose 5 into any suitable receptacle (not shown). The suction on the carpet draws fresh air through the carpet which 'expcls the dirt as fully indicated in the drawings.

Where the carpet is unusually dirty, the induced or suction current may be supplemented by a directl blast impinging against and penetrating the carpet which has the effect of loosening the dirt before the latter may be properly expelled. VTol effect this supplemental action, the valve 9 is opened, when a portion of the'main current is shunted' into the pipe whence it passes through the passage 1'5, and socket 16, directly into the chamber 2l of the blast-nozzle 20, escaping therefrom in a thin sheet or knifeV edge throng-lr the slit 22, cutting into the carpet and dis- `lodging the dirt therefrom. This direct blast current follows -to a greater orv less degree the plane extended bottom faces of the respective sections of the blastv nozzle, being eventually drawninto the 'chamber 2 beyond the sides of the blast-nozzle by the exhaust or suction current passing up through the mchamber 2 ariane between the yertical walls of the blast-nozzle and casing 1 (Fig. 6), the two currents thus mingling and escaping through the pipe 4 as already described.

It will be observed that the slit of the blast-nozzle is bounded on either side by an extended plane face resting against the surface of the carpet (Figs. 5, (i), such extended plane faces permitting the forced -current or direct blast to permeate and penetrate the carpet along surfaces coextensive with the areas of said faces, and thoroughly clean the carpet, before joining the induced currents on the opposite sides of the nozzle where the two sections of the current mingle and jointly pass up the sides of the blastnozzle to be conveyed out of the machine as already described.

Obviously I may depart in a measure from the details here shown without in any wise affecting the nature or spirit of my invention.

Having described my invention, what I claim is:

1. In a pneumatic renovator', a easing having n chamber c, pen ut the bottom, a blnst-nozzie received by said chamber, a hollow nipple leading from the top of the blast nozzle, n screw-holt projecting through the top of the casing and terminating in a socket adopted to be coupled to the nipple, a nut passed over the screw-threaded projecting portion of the bolt for drawing the parts together, the casing having a channel formed therein und communicatim.: with the interior of the socket through the peripheral walls thereof, and means for forcing air under pressure throughthe passage, socket, and blast-nozzle, substantially as set forth. l

2. In a pneumatic renovator, a casing having a chamber; open at the bottom, the upper wall of the casing having a channel formed therein for receiving air under pressure, an exhaust nozzle disposed-across vthe top of the chamber, .-xn annular chamber being formed at the inner end of the chan-nei encompassing the exhaust nozzle arid communicating with the interior thereof through its peripheral wall, a plug for closing the rear end of, the nozzle, a hollow boss integral with the casing and disposed in the path of the line of dischurge from the'exhaust nozzle, and an exhaust pipe coupled to the boss, substantially as set forth.

Intestimony whereof -I a'lx my signature, in presence of two witnesses. V

FRANK T. SNYDER. Witnesses:

EMIL STAREK, MARY D. WHI'rcoMB. 

